once you badly damage the ankle ligaments they can take an awfully long time to get back to normal - if they ever do. my missus badly twisted hers many years ago and can still get some pain if she steps on something awkwardly.
that's the bad news.
but - patience, perseverance and bloody mindedness will get you back! she's running OK these days (maratho training at the mo) and her ankle has strengthened over time.
you may have to accept a longer rest period but there are exercises you can do to help strengthen the ankle - a wobble board is a good way for example. perhaps look at an ankle support, or tape up before running? it's not offering a cure, but may help stabilise the ankle a bit to allow you to run and get your confidence back.
just take your time